Even if your TV is the same resolution your still loosing detail because your sitting +6ft away instead of 2ft is it still there? ya but are you seeing it nope
Depends on one's vision. 1920x1080 from 5' is still sharper, to me, than 1680x1050 from 2'. Also, at least with my TV, each pixel is substantially larger, somewhat negating the distance from the screen's impact on clarity/crispness.
Example: 1080 Planet Earth episodes on my TV
do look sharper from my couch than they do sitting right in front of my monitor as their not downscaled to fit on my monitor.
Besides the fact that a decent tv costs a whole lot more than a monitor.
*wants a 30" 2650x1600 monitor right up in their face*